Sound Attenuation - Main Ducts to Branches

Sound attenuation for main ducts to branches.

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When main ducts are split into branches the sound power level - L_w - is reduced according the size of the branch, or amount of air to the branch.

sound allowance lw split main duct branch

The attenuation can be estimated by the diagram below:

sound allowance

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Related Topics

Acoustics Room acoustics, acoustic properties - decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity, attenuation ..
Noise and Sound in HVAC Systems Calculate noise, sound and silencers in HVAC systems

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Sound Attenuation - Duct split to Terminals Estimation of sound attenuation when ducts are split to terminals
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